From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: akpm@linux-foundation.org, peterz@infradead.org, will@kernel.org,
mpe@ellerman.id.au
Cc: linux-arch@vger.kernel.org, linux-mm@kvack.org,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
"Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
Subject: [PATCH v4 8/9] asm-generic/tlb: Rename HAVE_MMU_GATHER_NO_GATHER
Date: Thu, 16 Jan 2020 12:15:30 +0530 [thread overview]
Message-ID: <20200116064531.483522-9-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20200116064531.483522-1-aneesh.kumar@linux.ibm.com>
From: Peter Zijlstra <peterz@infradead.org>
Towards a more consistent naming scheme.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
arch/Kconfig | 2 +-
arch/s390/Kconfig | 2 +-
include/asm-generic/tlb.h | 14 ++++++++++++--
mm/mmu_gather.c | 10 +++++-----
4 files changed, 19 insertions(+), 9 deletions(-)
diff --git a/arch/Kconfig b/arch/Kconfig
index e8548211b6a9..c35668fbf4d4 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -402,7 +402,7 @@ config MMU_GATHER_PAGE_SIZE
config MMU_GATHER_NO_RANGE
bool
-config HAVE_MMU_GATHER_NO_GATHER
+config MMU_GATHER_NO_GATHER
bool
config ARCH_HAVE_NMI_SAFE_CMPXCHG
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index e2cde82a1a3c..de39c2e92435 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -163,7 +163,7 @@ config S390
select HAVE_PERF_USER_STACK_DUMP
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_MEMBLOCK_PHYS_MAP
- select HAVE_MMU_GATHER_NO_GATHER
+ select MMU_GATHER_NO_GATHER
select HAVE_MOD_ARCH_SPECIFIC
select HAVE_NOP_MCOUNT
select HAVE_OPROFILE
diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h
index 53befa5acb27..ca0fe75b5355 100644
--- a/include/asm-generic/tlb.h
+++ b/include/asm-generic/tlb.h
@@ -143,6 +143,16 @@
* MMU_GATHER_NO_RANGE
*
* Use this if your architecture lacks an efficient flush_tlb_range().
+ *
+ * MMU_GATHER_NO_GATHER
+ *
+ * If the option is set the mmu_gather will not track individual pages for
+ * delayed page free anymore. A platform that enables the option needs to
+ * provide its own implementation of the __tlb_remove_page_size() function to
+ * free pages.
+ *
+ * This is useful if your architecture already flushes TLB entries in the
+ * various ptep_get_and_clear() functions.
*/
#ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE
@@ -202,7 +212,7 @@ extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
#endif /* CONFIG_MMU_GATHER_RCU_TABLE_FREE */
-#ifndef CONFIG_HAVE_MMU_GATHER_NO_GATHER
+#ifndef CONFIG_MMU_GATHER_NO_GATHER
/*
* If we can't allocate a page to make a big batch of page pointers
* to work on, then just handle a few from the on-stack structure.
@@ -277,7 +287,7 @@ struct mmu_gather {
unsigned int batch_count;
-#ifndef CONFIG_HAVE_MMU_GATHER_NO_GATHER
+#ifndef CONFIG_MMU_GATHER_NO_GATHER
struct mmu_gather_batch *active;
struct mmu_gather_batch local;
struct page *__pages[MMU_GATHER_BUNDLE];
diff --git a/mm/mmu_gather.c b/mm/mmu_gather.c
index 297c70307367..a28c74328085 100644
--- a/mm/mmu_gather.c
+++ b/mm/mmu_gather.c
@@ -11,7 +11,7 @@
#include <asm/pgalloc.h>
#include <asm/tlb.h>
-#ifndef CONFIG_HAVE_MMU_GATHER_NO_GATHER
+#ifndef CONFIG_MMU_GATHER_NO_GATHER
static bool tlb_next_batch(struct mmu_gather *tlb)
{
@@ -89,7 +89,7 @@ bool __tlb_remove_page_size(struct mmu_gather *tlb, struct page *page, int page_
return false;
}
-#endif /* HAVE_MMU_GATHER_NO_GATHER */
+#endif /* MMU_GATHER_NO_GATHER */
#ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE
@@ -180,7 +180,7 @@ static void tlb_flush_mmu_free(struct mmu_gather *tlb)
#ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE
tlb_table_flush(tlb);
#endif
-#ifndef CONFIG_HAVE_MMU_GATHER_NO_GATHER
+#ifndef CONFIG_MMU_GATHER_NO_GATHER
tlb_batch_pages_flush(tlb);
#endif
}
@@ -211,7 +211,7 @@ void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm,
/* Is it from 0 to ~0? */
tlb->fullmm = !(start | (end+1));
-#ifndef CONFIG_HAVE_MMU_GATHER_NO_GATHER
+#ifndef CONFIG_MMU_GATHER_NO_GATHER
tlb->need_flush_all = 0;
tlb->local.next = NULL;
tlb->local.nr = 0;
@@ -271,7 +271,7 @@ void tlb_finish_mmu(struct mmu_gather *tlb,
tlb_flush_mmu(tlb);
-#ifndef CONFIG_HAVE_MMU_GATHER_NO_GATHER
+#ifndef CONFIG_MMU_GATHER_NO_GATHER
tlb_batch_list_free(tlb);
#endif
dec_tlb_flush_pending(tlb->mm);
--
2.24.1
next prev parent reply other threads:[~2020-01-16 7:05 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-16 6:45 [PATCH v4 0/9] Fixup page directory freeing Aneesh Kumar K.V
2020-01-16 6:45 ` [PATCH v4 1/9] powerpc/mmu_gather: Enable RCU_TABLE_FREE even for !SMP case Aneesh Kumar K.V
2020-01-18 11:01 ` Michael Ellerman
2020-01-16 6:45 ` [PATCH v4 2/9] mm/mmu_gather: Invalidate TLB correctly on batch allocation failure and flush Aneesh Kumar K.V
2020-01-18 11:04 ` Michael Ellerman
2020-01-16 6:45 ` [PATCH v4 3/9] asm-generic/tlb: Avoid potential double flush Aneesh Kumar K.V
2020-01-16 6:49 ` Aneesh Kumar K.V
2020-01-17 1:46 ` Andrew Morton
2020-01-16 6:45 ` [PATCH v4 4/9] asm-gemeric/tlb: Remove stray function declarations Aneesh Kumar K.V
2020-01-16 6:45 ` [PATCH v4 5/9] asm-generic/tlb: Add missing CONFIG symbol Aneesh Kumar K.V
2020-01-16 6:45 ` [PATCH v4 6/9] asm-generic/tlb: Rename HAVE_RCU_TABLE_FREE Aneesh Kumar K.V
2020-01-18 5:56 ` Aneesh Kumar K.V
2020-01-16 6:45 ` [PATCH v4 7/9] asm-generic/tlb: Rename HAVE_MMU_GATHER_PAGE_SIZE Aneesh Kumar K.V
2020-01-16 6:45 ` Aneesh Kumar K.V [this message]
2020-01-16 6:45 ` [PATCH v4 9/9] asm-generic/tlb: Provide MMU_GATHER_TABLE_FREE Aneesh Kumar K.V
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